Difference between revisions of "T-distribution"
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| − | T-distribution | + | The T-distribution can be used instead of the [[Normal distribution|Normal distribution]] when defining confidence intervals when sample size is small or the standard deviation is unknown. In comparison with the normal distribution the shape is lower and wider to allow for more uncertainty in the edges: |
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| + | <img src="/static/files/MBI/Module%207/studenttvsnormal.png" width=400> | ||
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| + | The width and height of the student t distribution varies with number of [[Degrees of freedom|Degrees of freedom]]. Lookup values in [[Student-T distribution table|Student-T distribution table]] | ||
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| + | Part of [[M7-Quantitative Decision Methods-S3 - Normal Distribution and confidence intervals|M7-Quantitative Decision Methods-S3 - Normal Distribution and confidence intervals]] | ||
[[Category:mbi]] | [[Category:mbi]] | ||
Latest revision as of 20:03, 27 August 2020
The T-distribution can be used instead of the Normal distribution when defining confidence intervals when sample size is small or the standard deviation is unknown. In comparison with the normal distribution the shape is lower and wider to allow for more uncertainty in the edges:
The width and height of the student t distribution varies with number of Degrees of freedom. Lookup values in Student-T distribution table
Part of M7-Quantitative Decision Methods-S3 - Normal Distribution and confidence intervals
